I have exactly the same error:
Unity Player [version: Unity 5.6.0f3_497a0f351392]
Client.exe caused an Access Violation (0xc0000005)
in module Client.exe at 0033:aead9567.
Error occurred at 2018-11-15_193954.
C:\Program Files (x86)\Steam\steamapps\common\Naval Action\Client.exe, run by jr.
31% memory in use.
16343 MB physical memory [11170 MB free].
24023 MB paging file [15725 MB free].
134217728 MB user address space [134213169 MB free].
Read from location 0000000e caused an access violation.
Context:
RDI: 0x00005853 RSI: 0x00001003 RAX: 0x00000000
RBX: 0x00efed90 RCX: 0x0000000e RDX: 0x00000000
RIP: 0xaead9567 RBP: 0x00000001 SegCs: 0x00000033
EFlags: 0x00010293 RSP: 0x00efeb60 SegSs: 0x0000002b
R8: 0x00000010 R9: 0x00000001 R10: 0xaf27ecd8
R11: 0x00000000 R12: 0x00000010 R13: 0x00000000
R14: 0x08154600 R15: 0x00efecf0
Bytes at CS:EIP:
0f b7 31 33 ff 48 8d 59 02 44 8d 7f 08 eb 07 0f